Use the following information to answer the next questions.
Atmospheric pressure at sea level is equal to a column of 760 mm Hg.
Oxygen makes up 21% of the atmosphere by volume.
-What is the partial pressure of oxygen (PO2)?
A)160 mm Hg
B)16 mm Hg
C)120/75
D)21/760
E)760/21

Question

Quizplus · Accepted Answer

The partial pressure of oxygen can be found by multiplying the total atmospheric pressure by the fraction of oxygen in the atmosphere. Therefore, PO2 = 760 mm Hg x 0.21 = 160 mm Hg.

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